<template>
  <view>
    <!-- 搜索栏 -->
    <view class="search-box">
      <uni-search-bar @confirm="search" @input="input" :radius="100" cancel-button="none" :focus="true"></uni-search-bar>
    </view>
    
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchRes.length!==0">
      <view class="sugg-item" v-for="(item,i) in searchRes" :key="i" @click="gotoDetail(item)">
        <view class="goods_name">{{item.goods_name}}</view>
        <uni-icons type="right" size="16"></uni-icons>
      </view>
    </view>

  
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="25" @click="historyClean"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list">
        <uni-tag :text="item" v-for="(item,i) in histories" :key="i" inverted="false" circle="true" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
  
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        kw: '',
        searchRes: [],
        historyList: []
      };
    },
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    methods: {
      input(e){
        
        clearTimeout(this.timer)
        
        this.timer = setTimeout(()=>{
          // console.log(e)
          this.kw=e
          this.getSearchList()
        },500)
      },
      async getSearchList(){
        if (this.kw.length === 0) {
          this.searchRes=[]
          return
        }
        const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch', {query : this.kw})
        if (res.meta.status!==200) return uni.$showMsg()
        
        this.searchRes=res.message
        this.saveSearchHistory()
      },
      gotoDetail(item){
        console.log(item.goods_id)
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id  
        })
      },
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        
        set.delete(this.kw)
        set.add(this.kw)
        console.log(set)
        this.historyList=Array.from(set)
        
        //搜索历史持久化存储
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      historyClean(){
        this.historyList=[]
         uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      gotoGoodsList(kw){
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    },
    computed: {
      histories(){
        return [...this.historyList].reverse()
      }
    }
  }
</script>

<style lang="scss">
.search-box{
  background-color: #C00000;
  position: sticky;
  top: 0;
  z-index: 999;
}

.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #C00000;
    .goods_name{
      // 文本不换行
      white-space: nowrap;
      //超出的内容隐藏
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}
.history-box{
  padding: 0 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    border-bottom: 1px solid #000000;
  }
  .history-list{
    display: flex;
    flex-wrap: wrap;
    margin-top: 5px;
    .uni-tag{
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}

</style>
